pot-hole

n 1 deep hole worn in rock, eg in limestone caves by water 瓯穴（石灰石洞穴等内之岩石上被水侵蚀成的深洞）. 2 rough hole in a road surface made by rain and traffic （路面上因下雨和行车而形成的）坑洼.

postmark, postmaster, Postmaster General, postnatal, postpone, postponement, postprandial, postscript, postulant, postulate, postulation, posture, posturer, posy, pot, pot plant, pot-belly, pot-boiler, pot-bound, pot-herb, pot-holer, pot-holing, pot-hunter, pot-pourri, pot-roast, pot-shot (also pot), potable, potantially, potash, potassium, potation, potato, potato beetle, potato crisp, potboiler, poteen, potency, potent, potentate, potential,